Tony Hawk's Pro Skater 4

Turbo mode:
Get all the gaps on each level except The Zone to unlock the Turbo option.
Information in this section was contributed by RVToys3.

Hidden skater:
Complete the Pro Challenges to unlock Mindy, Frycook, Momo and Roger.
Information in this section was contributed by RVToys3.

The Zone level:
Get all 90 packages to unlock The Zone.
Information in this section was contributed by Ethan Lee.

Pro Challenge:
Get all goals in a level. Note: This must be done before any of the buyable cheats can be used for that skater.

Pro Skater animations:
Win the Pro Objective for that skater.

Moon physics:
Spend $40 at the skate shop.

Jet pack mode:
Spend $40 at the skate shop. Press B to fly up, A to move right, L to move left, and R to hover.

Matrix mode:
Spend $40 at the skate shop.

Alternate outfit:
Spend $40 at the skate shop.

Stud mode:
Spend $240 at the skate shop.

Always special:
Spend $240 at the skate shop.

Perfect rail balance:
Spend $240 at the skate shop.

Perfect manual balance:
Spend $240 at the skate shop.

Hint: Skitchin':
To skitch a car, go behind a car and hold A + B.
Information in this section was contributed by TekDek1002.

Hint: Walking:
Hold Down until you stop moving. Then, hold A to pick up your board and start walking.
Information in this section was contributed by TekDek1002.

Hint: Land any trick:
Go to the options menu. Where it reads "Normal mode", press Right and it will read "Kid mode". You will now land every trick except manuals, lips, and grinds.

Hint: Tony Hawk's Pro Skater 4 board:
Go to the skate shop and select "Change Deck". The board under "Custom" is the Tony Hawk's Pro Skater 4 board for Neversoft skaters.
Information in this section was contributed by TekDek1002.

Glitch: Alcatraz: Froggy dance:
Do a "Mr. Business" going left. When you are close to the end of the roof, ollie, then hold Down + Grind. When you ollie, go towards the end of the roof. When you start grinding the very end point of the roof, hold Ollie + Down + Grind. If done correctly, the skater you chose should be hopping back and forth like a frog as long as those buttons are held. To exit, release Ollie.
Information in this section was contributed by william little.